... ,7/32,1/4,5/16 11/32,3/8,15/32,29/64,31/64,1/2,9/16,5/8,3/4 copper coated ... 1 Chemical :ItemC%Si%Mn%P%S%HardnessAISI 10100.08~0.130.30Max0.50Max0.07Max0.06MaxHRC 58-62 AISI 10150.13 ... 0.180.10~0.300.30~0.600.04Max********AISI 10450.43~0.500.10~0.300.60~0.900.04Max0.05MaxAISI 10850.83~0.880.10~0 ... .300.30~0 ...